[lttng-tools.git] / src / bin / lttng-sessiond / sessiond-config.c

/*
 * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 */

#include "version.h"
#include "sessiond-config.h"
#include "lttng-ust-ctl.h"
#include <common/defaults.h>
#include <limits.h>
#include <ctype.h>
#include <common/error.h>
#include <common/utils.h>
#include <common/compat/errno.h>
#include <common/compat/getenv.h>

static
struct sessiond_config sessiond_config_build_defaults = {
	.quiet =		        	false,
	.verbose = 				0,
	.verbose_consumer = 			0,

	.agent_tcp_port = 			{ .begin = DEFAULT_AGENT_TCP_PORT_RANGE_BEGIN, .end = DEFAULT_AGENT_TCP_PORT_RANGE_END },
	.event_notifier_buffer_size_kernel =	DEFAULT_EVENT_NOTIFIER_ERROR_COUNT_MAP_SIZE,
	.event_notifier_buffer_size_userspace =	DEFAULT_EVENT_NOTIFIER_ERROR_COUNT_MAP_SIZE,
	.app_socket_timeout = 			DEFAULT_APP_SOCKET_RW_TIMEOUT,

	.no_kernel = 				false,
	.background = 				false,
	.daemonize = 				false,
	.sig_parent = 				false,

	.tracing_group_name.value = 		(char *) DEFAULT_TRACING_GROUP,
	.kmod_probes_list.value =		NULL,
	.kmod_extra_probes_list.value =		NULL,

	.rundir.value =				NULL,

	.apps_unix_sock_path.value = 		NULL,
	.client_unix_sock_path.value = 		NULL,
	.wait_shm_path.value = 			NULL,
	.health_unix_sock_path.value = 		NULL,
	.lttng_ust_clock_plugin.value =		NULL,
	.pid_file_path.value =			NULL,
	.lock_file_path.value =			NULL,
	.agent_port_file_path.value =		NULL,
	.load_session_path.value =		NULL,

	.consumerd32_path.value =		NULL,
	.consumerd32_bin_path.value =		NULL,
	.consumerd32_lib_dir.value =		NULL,
	.consumerd32_err_unix_sock_path.value = NULL,
	.consumerd32_cmd_unix_sock_path.value = NULL,

	.consumerd64_path.value =		NULL,
	.consumerd64_bin_path.value =		NULL,
	.consumerd64_lib_dir.value =		NULL,
	.consumerd64_err_unix_sock_path.value = NULL,
	.consumerd64_cmd_unix_sock_path.value = NULL,

	.kconsumerd_path.value =		NULL,
	.kconsumerd_err_unix_sock_path.value = 	NULL,
	.kconsumerd_cmd_unix_sock_path.value = 	NULL,
};

static
void config_string_fini(struct config_string *str)
{
	config_string_set(str, NULL);
}

static
void config_string_set_static(struct config_string *config_str,
		const char *value)
{
	config_string_set(config_str, (char *) value);
	config_str->should_free = false;
}

/* Only use for dynamically-allocated strings. */
void config_string_set(struct config_string *config_str, char *value)
{
	LTTNG_ASSERT(config_str);
	if (config_str->should_free) {
		free(config_str->value);
		config_str->should_free = false;
	}

	config_str->should_free = !!value;
	config_str->value = value;
}

int sessiond_config_apply_env_config(struct sessiond_config *config)
{
	int ret = 0;
	const char *env_value;

	env_value = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV);
	if (env_value) {
		char *endptr;
		long int_val;

		errno = 0;
		int_val = strtoul(env_value, &endptr, 0);
		if (errno != 0 || int_val > INT_MAX ||
				(int_val < 0 && int_val != -1)) {
			ERR("Invalid value \"%s\" used for \"%s\" environment variable",
					env_value, DEFAULT_APP_SOCKET_TIMEOUT_ENV);
			ret = -1;
			goto end;
		}

		config->app_socket_timeout = int_val;
	}

	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN");
	if (env_value) {
		config_string_set_static(&config->consumerd32_bin_path,
				env_value);
	}
	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN");
	if (env_value) {
		config_string_set_static(&config->consumerd64_bin_path,
				env_value);
	}

	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR");
	if (env_value) {
		config_string_set_static(&config->consumerd32_lib_dir,
				env_value);
	}
	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR");
	if (env_value) {
		config_string_set_static(&config->consumerd64_lib_dir,
				env_value);
	}

	env_value = lttng_secure_getenv("LTTNG_UST_CLOCK_PLUGIN");
	if (env_value) {
		config_string_set_static(&config->lttng_ust_clock_plugin,
				env_value);
	}

	env_value = lttng_secure_getenv(DEFAULT_LTTNG_KMOD_PROBES);
	if (env_value) {
		config_string_set_static(&config->kmod_probes_list,
				env_value);
	}

	env_value = lttng_secure_getenv(DEFAULT_LTTNG_EXTRA_KMOD_PROBES);
	if (env_value) {
		config_string_set_static(&config->kmod_extra_probes_list,
				env_value);
	}
end:
	return ret;
}

static
int config_set_paths_root(struct sessiond_config *config)
{
	int ret = 0;

	config_string_set(&config->rundir, strdup(DEFAULT_LTTNG_RUNDIR));
	if (!config->rundir.value) {
		ERR("Failed to set rundir");
		ret = -1;
		goto end;
	}

	config_string_set_static(&config->apps_unix_sock_path,
			DEFAULT_GLOBAL_APPS_UNIX_SOCK);
	config_string_set_static(&config->client_unix_sock_path,
			DEFAULT_GLOBAL_CLIENT_UNIX_SOCK);
	config_string_set_static(&config->wait_shm_path,
			DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH);
	config_string_set_static(&config->health_unix_sock_path,
			DEFAULT_GLOBAL_HEALTH_UNIX_SOCK);
end:
	return ret;
}

static
int config_set_paths_non_root(struct sessiond_config *config)
{
	int ret = 0;
	const char *home_path = utils_get_home_dir();
	char *str;

	if (home_path == NULL) {
		ERR("Can't get HOME directory for sockets creation.");
		ret = -1;
		goto end;
	}

	/*
	 * Create rundir from home path. This will create something like
	 * $HOME/.lttng
	 */
	ret = asprintf(&str, DEFAULT_LTTNG_HOME_RUNDIR, home_path);
	if (ret < 0) {
		ERR("Failed to set rundir");
		goto end;
	}
	config_string_set(&config->rundir, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_HOME_APPS_UNIX_SOCK, home_path);
	if (ret < 0) {
		ERR("Failed to set default home apps unix socket path");
		goto end;
	}
	config_string_set(&config->apps_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path);
	if (ret < 0) {
		ERR("Failed to set default home client unix socket path");
		goto end;
	}
	config_string_set(&config->client_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid());
	if (ret < 0) {
		ERR("Failed to set default home apps wait shm path");
		goto end;
	}
	config_string_set(&config->wait_shm_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path);
	if (ret < 0) {
		ERR("Failed to set default home health UNIX socket path");
		goto end;
	}
	config_string_set(&config->health_unix_sock_path, str);
	str = NULL;

	ret = 0;
end:
	return ret;
}

int sessiond_config_init(struct sessiond_config *config)
{
	int ret;
	bool is_root = (getuid() == 0);
	char *str;

	LTTNG_ASSERT(config);
	memcpy(config, &sessiond_config_build_defaults, sizeof(*config));

	if (is_root) {
		ret = config_set_paths_root(config);
	} else {
		ret = config_set_paths_non_root(config);
	}
	if (ret < 0) {
		goto error;
	}

	/* 32 bits consumerd path setup */
	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 32-bit consumer path");
		goto error;
	}
	config_string_set(&config->consumerd32_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 32-bit consumer error socket path");
		goto error;
	}
	config_string_set(&config->consumerd32_err_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 32-bit consumer command socket path");
		goto error;
	}
	config_string_set(&config->consumerd32_cmd_unix_sock_path, str);
	str = NULL;

	/* 64 bits consumerd path setup */
	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 64-bit consumer path");
		goto error;
	}
	config_string_set(&config->consumerd64_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 64-bit consumer error socket path");
		goto error;
	}
	config_string_set(&config->consumerd64_err_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 64-bit consumer command socket path");
		goto error;
	}
	config_string_set(&config->consumerd64_cmd_unix_sock_path, str);
	str = NULL;

	/* kconsumerd consumerd path setup */
	ret = asprintf(&str, DEFAULT_KCONSUMERD_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set kernel consumer path");
		goto error;
	}
	config_string_set(&config->kconsumerd_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set kernel consumer error socket path");
		goto error;
	}
	config_string_set(&config->kconsumerd_err_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set kernel consumer command socket path");
		goto error;
	}
	config_string_set(&config->kconsumerd_cmd_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, "%s/%s", config->rundir.value,
			DEFAULT_LTTNG_SESSIOND_PIDFILE);
	if (ret < 0) {
		ERR("Failed to set PID file path");
		goto error;
	}
	config_string_set(&config->pid_file_path, str);
	str = NULL;

	ret = asprintf(&str, "%s/%s", config->rundir.value,
			DEFAULT_LTTNG_SESSIOND_LOCKFILE);
	if (ret < 0) {
		ERR("Failed to set lock file path");
		goto error;
	}
	config_string_set(&config->lock_file_path, str);
	str = NULL;

	ret = asprintf(&str, "%s/%s", config->rundir.value,
			DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE);
	if (ret < 0) {
		ERR("Failed to set agent port file path");
		goto error;
	}
	config_string_set(&config->agent_port_file_path, str);
	str = NULL;

	/*
	 * Allow INSTALL_BIN_PATH to be used as a target path for the
	 * native architecture size consumer if CONFIG_CONSUMER*_PATH
	 * has not been defined.
	 */
#if (CAA_BITS_PER_LONG == 32)
	config_string_set_static(&config->consumerd32_bin_path,
			INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	config_string_set_static(&config->consumerd32_lib_dir,
			INSTALL_LIB_PATH);
#elif (CAA_BITS_PER_LONG == 64)
	config_string_set_static(&config->consumerd64_bin_path,
			INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	config_string_set_static(&config->consumerd64_lib_dir,
			INSTALL_LIB_PATH);
#else
#error "Unknown bitness"
#endif
	ret = 0;
	return ret;
error:
	sessiond_config_fini(config);
	return ret;
}

void sessiond_config_fini(struct sessiond_config *config)
{
	config_string_fini(&config->tracing_group_name);
	config_string_fini(&config->kmod_probes_list);
	config_string_fini(&config->kmod_extra_probes_list);
	config_string_fini(&config->rundir);
	config_string_fini(&config->apps_unix_sock_path);
	config_string_fini(&config->client_unix_sock_path);
	config_string_fini(&config->wait_shm_path);
	config_string_fini(&config->health_unix_sock_path);
	config_string_fini(&config->lttng_ust_clock_plugin);
	config_string_fini(&config->pid_file_path);
	config_string_fini(&config->lock_file_path);
	config_string_fini(&config->load_session_path);
	config_string_fini(&config->agent_port_file_path);
	config_string_fini(&config->consumerd32_path);
	config_string_fini(&config->consumerd32_bin_path);
	config_string_fini(&config->consumerd32_lib_dir);
	config_string_fini(&config->consumerd32_err_unix_sock_path);
	config_string_fini(&config->consumerd32_cmd_unix_sock_path);
	config_string_fini(&config->consumerd64_path);
	config_string_fini(&config->consumerd64_bin_path);
	config_string_fini(&config->consumerd64_lib_dir);
	config_string_fini(&config->consumerd64_err_unix_sock_path);
	config_string_fini(&config->consumerd64_cmd_unix_sock_path);
	config_string_fini(&config->kconsumerd_path);
	config_string_fini(&config->kconsumerd_err_unix_sock_path);
	config_string_fini(&config->kconsumerd_cmd_unix_sock_path);
}

static
int resolve_path(struct config_string *path)
{
	int ret = 0;
	char *absolute_path;

	if (!path->value || path->value[0] == '/') {
		goto end;
	}

	absolute_path = utils_expand_path(path->value);
	if (!absolute_path) {
		ret = -1;
		goto end;
	}

	config_string_set(path, absolute_path);
end:
	return ret;
}

#define RESOLVE_CHECK(path_config_str)		\
	if (resolve_path(path_config_str))	\
		return -1

int sessiond_config_resolve_paths(struct sessiond_config *config)
{
	RESOLVE_CHECK(&config->apps_unix_sock_path);
	RESOLVE_CHECK(&config->client_unix_sock_path);
	RESOLVE_CHECK(&config->wait_shm_path);
	RESOLVE_CHECK(&config->health_unix_sock_path);
	RESOLVE_CHECK(&config->lttng_ust_clock_plugin);
	RESOLVE_CHECK(&config->pid_file_path);
	RESOLVE_CHECK(&config->lock_file_path);
	RESOLVE_CHECK(&config->load_session_path);
	RESOLVE_CHECK(&config->agent_port_file_path);
	RESOLVE_CHECK(&config->consumerd32_path);
	RESOLVE_CHECK(&config->consumerd32_bin_path);
	RESOLVE_CHECK(&config->consumerd32_lib_dir);
	RESOLVE_CHECK(&config->consumerd32_err_unix_sock_path);
	RESOLVE_CHECK(&config->consumerd32_cmd_unix_sock_path);
	RESOLVE_CHECK(&config->consumerd64_path);
	RESOLVE_CHECK(&config->consumerd64_bin_path);
	RESOLVE_CHECK(&config->consumerd64_lib_dir);
	RESOLVE_CHECK(&config->consumerd64_err_unix_sock_path);
	RESOLVE_CHECK(&config->consumerd64_cmd_unix_sock_path);
	RESOLVE_CHECK(&config->kconsumerd_path);
	RESOLVE_CHECK(&config->kconsumerd_err_unix_sock_path);
	RESOLVE_CHECK(&config->kconsumerd_cmd_unix_sock_path);
	return 0;
}

void sessiond_config_log(struct sessiond_config *config)
{
	DBG_NO_LOC("[sessiond configuration]");
	DBG_NO_LOC("\tversion                        %s", VERSION);
	if (GIT_VERSION[0] != '\0') {
		DBG_NO_LOC("\tgit version                    %s", GIT_VERSION);
	}
	if (EXTRA_VERSION_NAME[0] != '\0') {
		DBG_NO_LOC("\textra version name             %s", EXTRA_VERSION_NAME);
	}
	if (EXTRA_VERSION_DESCRIPTION[0] != '\0') {
		DBG_NO_LOC("\textra version description:\n\t%s", EXTRA_VERSION_DESCRIPTION);
	}
	if (EXTRA_VERSION_PATCHES[0] != '\0') {
		DBG_NO_LOC("\textra version patches:\n\t%s", EXTRA_VERSION_PATCHES);
	}
	DBG_NO_LOC("\tverbose:                       %i", config->verbose);
	DBG_NO_LOC("\tverbose consumer:              %i", config->verbose_consumer);
	DBG_NO_LOC("\tquiet mode:                    %s", config->quiet ? "True" : "False");
	if (config->agent_tcp_port.begin == config->agent_tcp_port.end) {
		DBG_NO_LOC("\tagent_tcp_port:                %i", config->agent_tcp_port.begin);
	} else {
		DBG_NO_LOC("\tagent_tcp_port:                [%i, %i]",
				config->agent_tcp_port.begin,
				config->agent_tcp_port.end);
	}
	DBG_NO_LOC("\tapplication socket timeout:    %i", config->app_socket_timeout);
	DBG_NO_LOC("\tno-kernel:                     %s", config->no_kernel ? "True" : "False");
	DBG_NO_LOC("\tbackground:                    %s", config->background ? "True" : "False");
	DBG_NO_LOC("\tdaemonize:                     %s", config->daemonize ? "True" : "False");
	DBG_NO_LOC("\tsignal parent on start:        %s", config->sig_parent ? "True" : "False");
	DBG_NO_LOC("\ttracing group name:            %s", config->tracing_group_name.value ? : "Unknown");
	DBG_NO_LOC("\tkmod_probe_list:               %s", config->kmod_probes_list.value ? : "None");
	DBG_NO_LOC("\tkmod_extra_probe_list:         %s", config->kmod_extra_probes_list.value ? : "None");
	DBG_NO_LOC("\trundir:                        %s", config->rundir.value ? : "Unknown");
	DBG_NO_LOC("\tapplication socket path:       %s", config->apps_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tclient socket path:            %s", config->client_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\twait shm path:                 %s", config->wait_shm_path.value ? : "Unknown");
	DBG_NO_LOC("\thealth socket path:            %s", config->health_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tLTTNG_UST_CLOCK_PLUGIN:        %s", config->lttng_ust_clock_plugin.value ? : "None");
	DBG_NO_LOC("\tpid file path:                 %s", config->pid_file_path.value ? : "Unknown");
	DBG_NO_LOC("\tlock file path:                %s", config->lock_file_path.value ? : "Unknown");
	DBG_NO_LOC("\tsession load path:             %s", config->load_session_path.value ? : "None");
	DBG_NO_LOC("\tagent port file path:          %s", config->agent_port_file_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 path:              %s", config->consumerd32_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 bin path:          %s", config->consumerd32_bin_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 lib dir:           %s", config->consumerd32_lib_dir.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 err unix sock path:%s", config->consumerd32_err_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 cmd unix sock path:%s", config->consumerd32_cmd_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 path:              %s", config->consumerd64_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 bin path:          %s", config->consumerd64_bin_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 lib dir:           %s", config->consumerd64_lib_dir.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 err unix sock path:%s", config->consumerd64_err_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 cmd unix sock path:%s", config->consumerd64_cmd_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tkconsumerd path:               %s", config->kconsumerd_path.value ? : "Unknown");
	DBG_NO_LOC("\tkconsumerd err unix sock path: %s", config->kconsumerd_err_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tkconsumerd cmd unix sock path: %s", config->kconsumerd_cmd_unix_sock_path.value ? : "Unknown");
}
Commit	Line	Data
e6142f2e	1	/*
ab5be9fa	2	* Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
e6142f2e	3	*
ab5be9fa	4	* SPDX-License-Identifier: GPL-2.0-only
e6142f2e	5	*
e6142f2e JG	6	*/
e6142f2e JG	7
a3bc3918	8	#include "version.h"
e6142f2e	9	#include "sessiond-config.h"
e6142f2e JG	10	#include "lttng-ust-ctl.h"
	11	#include <common/defaults.h>
	12	#include <limits.h>
e6142f2e JG	13	#include <ctype.h>
	14	#include <common/error.h>
	15	#include <common/utils.h>
edf4b93e	16	#include <common/compat/errno.h>
e6142f2e JG	17	#include <common/compat/getenv.h>
	18
	19	static
	20	struct sessiond_config sessiond_config_build_defaults = {
	21	.quiet = false,
	22	.verbose = 0,
	23	.verbose_consumer = 0,
	24
2288467f	25	.agent_tcp_port = { .begin = DEFAULT_AGENT_TCP_PORT_RANGE_BEGIN, .end = DEFAULT_AGENT_TCP_PORT_RANGE_END },
761ffce2 FD	26	.event_notifier_buffer_size_kernel = DEFAULT_EVENT_NOTIFIER_ERROR_COUNT_MAP_SIZE,
761ffce2 FD	27	.event_notifier_buffer_size_userspace = DEFAULT_EVENT_NOTIFIER_ERROR_COUNT_MAP_SIZE,
e6142f2e JG	28	.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT,
	29
	30	.no_kernel = false,
	31	.background = false,
	32	.daemonize = false,
	33	.sig_parent = false,
	34
b53d4e59	35	.tracing_group_name.value = (char *) DEFAULT_TRACING_GROUP,
e6142f2e JG	36	.kmod_probes_list.value = NULL,
	37	.kmod_extra_probes_list.value = NULL,
	38
	39	.rundir.value = NULL,
	40
	41	.apps_unix_sock_path.value = NULL,
	42	.client_unix_sock_path.value = NULL,
	43	.wait_shm_path.value = NULL,
	44	.health_unix_sock_path.value = NULL,
	45	.lttng_ust_clock_plugin.value = NULL,
	46	.pid_file_path.value = NULL,
	47	.lock_file_path.value = NULL,
	48	.agent_port_file_path.value = NULL,
	49	.load_session_path.value = NULL,
	50
	51	.consumerd32_path.value = NULL,
	52	.consumerd32_bin_path.value = NULL,
	53	.consumerd32_lib_dir.value = NULL,
	54	.consumerd32_err_unix_sock_path.value = NULL,
	55	.consumerd32_cmd_unix_sock_path.value = NULL,
	56
	57	.consumerd64_path.value = NULL,
	58	.consumerd64_bin_path.value = NULL,
	59	.consumerd64_lib_dir.value = NULL,
	60	.consumerd64_err_unix_sock_path.value = NULL,
	61	.consumerd64_cmd_unix_sock_path.value = NULL,
	62
	63	.kconsumerd_path.value = NULL,
	64	.kconsumerd_err_unix_sock_path.value = NULL,
	65	.kconsumerd_cmd_unix_sock_path.value = NULL,
	66	};
	67
	68	static
	69	void config_string_fini(struct config_string *str)
	70	{
	71	config_string_set(str, NULL);
	72	}
	73
	74	static
	75	void config_string_set_static(struct config_string *config_str,
	76	const char *value)
	77	{
	78	config_string_set(config_str, (char *) value);
	79	config_str->should_free = false;
	80	}
	81
	82	/* Only use for dynamically-allocated strings. */
e6142f2e JG	83	void config_string_set(struct config_string config_str, char value)
e6142f2e JG	84	{
a0377dfe	85	LTTNG_ASSERT(config_str);
e6142f2e JG	86	if (config_str->should_free) {
	87	free(config_str->value);
	88	config_str->should_free = false;
	89	}
	90
	91	config_str->should_free = !!value;
	92	config_str->value = value;
	93	}
	94
e6142f2e JG	95	int sessiond_config_apply_env_config(struct sessiond_config *config)
	96	{
	97	int ret = 0;
	98	const char *env_value;
	99
	100	env_value = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV);
	101	if (env_value) {
	102	char *endptr;
	103	long int_val;
	104
	105	errno = 0;
	106	int_val = strtoul(env_value, &endptr, 0);
	107	if (errno != 0 \|\| int_val > INT_MAX \|\|
	108	(int_val < 0 && int_val != -1)) {
	109	ERR("Invalid value \"%s\" used for \"%s\" environment variable",
	110	env_value, DEFAULT_APP_SOCKET_TIMEOUT_ENV);
	111	ret = -1;
	112	goto end;
	113	}
	114
	115	config->app_socket_timeout = int_val;
	116	}
	117
	118	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN");
	119	if (env_value) {
	120	config_string_set_static(&config->consumerd32_bin_path,
	121	env_value);
	122	}
	123	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN");
	124	if (env_value) {
	125	config_string_set_static(&config->consumerd64_bin_path,
	126	env_value);
	127	}
	128
	129	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR");
	130	if (env_value) {
	131	config_string_set_static(&config->consumerd32_lib_dir,
	132	env_value);
	133	}
	134	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR");
	135	if (env_value) {
	136	config_string_set_static(&config->consumerd64_lib_dir,
	137	env_value);
	138	}
	139
	140	env_value = lttng_secure_getenv("LTTNG_UST_CLOCK_PLUGIN");
	141	if (env_value) {
	142	config_string_set_static(&config->lttng_ust_clock_plugin,
	143	env_value);
	144	}
	145
	146	env_value = lttng_secure_getenv(DEFAULT_LTTNG_KMOD_PROBES);
	147	if (env_value) {
	148	config_string_set_static(&config->kmod_probes_list,
	149	env_value);
	150	}
	151
	152	env_value = lttng_secure_getenv(DEFAULT_LTTNG_EXTRA_KMOD_PROBES);
	153	if (env_value) {
	154	config_string_set_static(&config->kmod_extra_probes_list,
	155	env_value);
	156	}
	157	end:
	158	return ret;
159	}
160
161	static
162	int config_set_paths_root(struct sessiond_config *config)
163	{
164	int ret = 0;
165
166	config_string_set(&config->rundir, strdup(DEFAULT_LTTNG_RUNDIR));
167	if (!config->rundir.value) {
168	ERR("Failed to set rundir");
169	ret = -1;
170	goto end;
171	}
172
173	config_string_set_static(&config->apps_unix_sock_path,
174	DEFAULT_GLOBAL_APPS_UNIX_SOCK);
175	config_string_set_static(&config->client_unix_sock_path,
176	DEFAULT_GLOBAL_CLIENT_UNIX_SOCK);
177	config_string_set_static(&config->wait_shm_path,
178	DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH);
179	config_string_set_static(&config->health_unix_sock_path,
180	DEFAULT_GLOBAL_HEALTH_UNIX_SOCK);
e6142f2e JG	181	end:
	182	return ret;
	183	}
	184
	185	static
	186	int config_set_paths_non_root(struct sessiond_config *config)
	187	{
	188	int ret = 0;
	189	const char *home_path = utils_get_home_dir();
	190	char *str;
	191
	192	if (home_path == NULL) {
	193	ERR("Can't get HOME directory for sockets creation.");
	194	ret = -1;
	195	goto end;
	196	}
	197
	198	/*
	199	* Create rundir from home path. This will create something like
	200	* $HOME/.lttng
	201	*/
	202	ret = asprintf(&str, DEFAULT_LTTNG_HOME_RUNDIR, home_path);
	203	if (ret < 0) {
	204	ERR("Failed to set rundir");
	205	goto end;
	206	}
	207	config_string_set(&config->rundir, str);
	208	str = NULL;
	209
	210	ret = asprintf(&str, DEFAULT_HOME_APPS_UNIX_SOCK, home_path);
	211	if (ret < 0) {
	212	ERR("Failed to set default home apps unix socket path");
	213	goto end;
	214	}
	215	config_string_set(&config->apps_unix_sock_path, str);
	216	str = NULL;
	217
	218	ret = asprintf(&str, DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path);
	219	if (ret < 0) {
	220	ERR("Failed to set default home client unix socket path");
	221	goto end;
	222	}
	223	config_string_set(&config->client_unix_sock_path, str);
	224	str = NULL;
	225
	226	ret = asprintf(&str, DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid());
	227	if (ret < 0) {
	228	ERR("Failed to set default home apps wait shm path");
	229	goto end;
	230	}
	231	config_string_set(&config->wait_shm_path, str);
	232	str = NULL;
	233
	234	ret = asprintf(&str, DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path);
	235	if (ret < 0) {
	236	ERR("Failed to set default home health UNIX socket path");
	237	goto end;
	238	}
	239	config_string_set(&config->health_unix_sock_path, str);
	240	str = NULL;
	241
	242	ret = 0;
	243	end:
	244	return ret;
245	}
246
e6142f2e JG	247	int sessiond_config_init(struct sessiond_config *config)
	248	{
	249	int ret;
	250	bool is_root = (getuid() == 0);
	251	char *str;
	252
a0377dfe	253	LTTNG_ASSERT(config);
e6142f2e JG	254	memcpy(config, &sessiond_config_build_defaults, sizeof(*config));
	255
	256	if (is_root) {
	257	ret = config_set_paths_root(config);
	258	} else {
	259	ret = config_set_paths_non_root(config);
	260	}
2a9f757b	261	if (ret < 0) {
c9a2957d	262	goto error;
2a9f757b	263	}
e6142f2e JG	264
	265	/* 32 bits consumerd path setup */
	266	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_PATH,
	267	config->rundir.value);
	268	if (ret < 0) {
	269	ERR("Failed to set 32-bit consumer path");
c9a2957d	270	goto error;
e6142f2e JG	271	}
	272	config_string_set(&config->consumerd32_path, str);
	273	str = NULL;
	274
	275	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH,
	276	config->rundir.value);
	277	if (ret < 0) {
	278	ERR("Failed to set 32-bit consumer error socket path");
c9a2957d	279	goto error;
e6142f2e JG	280	}
	281	config_string_set(&config->consumerd32_err_unix_sock_path, str);
	282	str = NULL;
	283
	284	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH,
	285	config->rundir.value);
	286	if (ret < 0) {
	287	ERR("Failed to set 32-bit consumer command socket path");
c9a2957d	288	goto error;
e6142f2e JG	289	}
	290	config_string_set(&config->consumerd32_cmd_unix_sock_path, str);
	291	str = NULL;
	292
	293	/* 64 bits consumerd path setup */
	294	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_PATH,
	295	config->rundir.value);
	296	if (ret < 0) {
	297	ERR("Failed to set 64-bit consumer path");
c9a2957d	298	goto error;
e6142f2e JG	299	}
	300	config_string_set(&config->consumerd64_path, str);
	301	str = NULL;
	302
	303	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH,
	304	config->rundir.value);
	305	if (ret < 0) {
	306	ERR("Failed to set 64-bit consumer error socket path");
c9a2957d	307	goto error;
e6142f2e JG	308	}
	309	config_string_set(&config->consumerd64_err_unix_sock_path, str);
	310	str = NULL;
	311
	312	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH,
	313	config->rundir.value);
	314	if (ret < 0) {
	315	ERR("Failed to set 64-bit consumer command socket path");
c9a2957d	316	goto error;
e6142f2e JG	317	}
	318	config_string_set(&config->consumerd64_cmd_unix_sock_path, str);
	319	str = NULL;
	320
	321	/* kconsumerd consumerd path setup */
	322	ret = asprintf(&str, DEFAULT_KCONSUMERD_PATH,
	323	config->rundir.value);
	324	if (ret < 0) {
	325	ERR("Failed to set kernel consumer path");
c9a2957d	326	goto error;
e6142f2e JG	327	}
	328	config_string_set(&config->kconsumerd_path, str);
	329	str = NULL;
	330
4a08b740 JG	331	ret = asprintf(&str, DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
	332	config->rundir.value);
	333	if (ret < 0) {
	334	ERR("Failed to set kernel consumer error socket path");
c9a2957d	335	goto error;
4a08b740 JG	336	}
	337	config_string_set(&config->kconsumerd_err_unix_sock_path, str);
	338	str = NULL;
	339
	340	ret = asprintf(&str, DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
	341	config->rundir.value);
	342	if (ret < 0) {
	343	ERR("Failed to set kernel consumer command socket path");
c9a2957d	344	goto error;
4a08b740 JG	345	}
	346	config_string_set(&config->kconsumerd_cmd_unix_sock_path, str);
	347	str = NULL;
	348
e6142f2e JG	349	ret = asprintf(&str, "%s/%s", config->rundir.value,
	350	DEFAULT_LTTNG_SESSIOND_PIDFILE);
	351	if (ret < 0) {
	352	ERR("Failed to set PID file path");
c9a2957d	353	goto error;
e6142f2e JG	354	}
	355	config_string_set(&config->pid_file_path, str);
	356	str = NULL;
	357
	358	ret = asprintf(&str, "%s/%s", config->rundir.value,
	359	DEFAULT_LTTNG_SESSIOND_LOCKFILE);
	360	if (ret < 0) {
	361	ERR("Failed to set lock file path");
c9a2957d	362	goto error;
e6142f2e JG	363	}
	364	config_string_set(&config->lock_file_path, str);
	365	str = NULL;
	366
	367	ret = asprintf(&str, "%s/%s", config->rundir.value,
	368	DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE);
	369	if (ret < 0) {
	370	ERR("Failed to set agent port file path");
c9a2957d	371	goto error;
e6142f2e JG	372	}
	373	config_string_set(&config->agent_port_file_path, str);
	374	str = NULL;
	375
	376	/*
	377	* Allow INSTALL_BIN_PATH to be used as a target path for the
	378	* native architecture size consumer if CONFIG_CONSUMER*_PATH
	379	* has not been defined.
	380	*/
	381	#if (CAA_BITS_PER_LONG == 32)
	382	config_string_set_static(&config->consumerd32_bin_path,
	383	INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	384	config_string_set_static(&config->consumerd32_lib_dir,
	385	INSTALL_LIB_PATH);
	386	#elif (CAA_BITS_PER_LONG == 64)
	387	config_string_set_static(&config->consumerd64_bin_path,
	388	INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	389	config_string_set_static(&config->consumerd64_lib_dir,
	390	INSTALL_LIB_PATH);
	391	#else
	392	#error "Unknown bitness"
	393	#endif
	394	ret = 0;
c9a2957d JG	395	return ret;
	396	error:
	397	sessiond_config_fini(config);
e6142f2e JG	398	return ret;
	399	}
	400
e6142f2e JG	401	void sessiond_config_fini(struct sessiond_config *config)
	402	{
	403	config_string_fini(&config->tracing_group_name);
	404	config_string_fini(&config->kmod_probes_list);
	405	config_string_fini(&config->kmod_extra_probes_list);
16ffecdb	406	config_string_fini(&config->rundir);
e6142f2e JG	407	config_string_fini(&config->apps_unix_sock_path);
	408	config_string_fini(&config->client_unix_sock_path);
	409	config_string_fini(&config->wait_shm_path);
	410	config_string_fini(&config->health_unix_sock_path);
	411	config_string_fini(&config->lttng_ust_clock_plugin);
	412	config_string_fini(&config->pid_file_path);
	413	config_string_fini(&config->lock_file_path);
	414	config_string_fini(&config->load_session_path);
	415	config_string_fini(&config->agent_port_file_path);
	416	config_string_fini(&config->consumerd32_path);
	417	config_string_fini(&config->consumerd32_bin_path);
	418	config_string_fini(&config->consumerd32_lib_dir);
	419	config_string_fini(&config->consumerd32_err_unix_sock_path);
	420	config_string_fini(&config->consumerd32_cmd_unix_sock_path);
	421	config_string_fini(&config->consumerd64_path);
	422	config_string_fini(&config->consumerd64_bin_path);
	423	config_string_fini(&config->consumerd64_lib_dir);
	424	config_string_fini(&config->consumerd64_err_unix_sock_path);
	425	config_string_fini(&config->consumerd64_cmd_unix_sock_path);
	426	config_string_fini(&config->kconsumerd_path);
	427	config_string_fini(&config->kconsumerd_err_unix_sock_path);
	428	config_string_fini(&config->kconsumerd_cmd_unix_sock_path);
	429	}
	430
	431	static
	432	int resolve_path(struct config_string *path)
	433	{
	434	int ret = 0;
	435	char *absolute_path;
	436
	437	if (!path->value \|\| path->value[0] == '/') {
	438	goto end;
	439	}
	440
	441	absolute_path = utils_expand_path(path->value);
	442	if (!absolute_path) {
	443	ret = -1;
	444	goto end;
	445	}
	446
	447	config_string_set(path, absolute_path);
	448	end:
	449	return ret;
	450	}
	451
	452	#define RESOLVE_CHECK(path_config_str) \
	453	if (resolve_path(path_config_str)) \
	454	return -1
	455
e6142f2e JG	456	int sessiond_config_resolve_paths(struct sessiond_config *config)
	457	{
	458	RESOLVE_CHECK(&config->apps_unix_sock_path);
	459	RESOLVE_CHECK(&config->client_unix_sock_path);
	460	RESOLVE_CHECK(&config->wait_shm_path);
	461	RESOLVE_CHECK(&config->health_unix_sock_path);
	462	RESOLVE_CHECK(&config->lttng_ust_clock_plugin);
	463	RESOLVE_CHECK(&config->pid_file_path);
	464	RESOLVE_CHECK(&config->lock_file_path);
	465	RESOLVE_CHECK(&config->load_session_path);
	466	RESOLVE_CHECK(&config->agent_port_file_path);
	467	RESOLVE_CHECK(&config->consumerd32_path);
	468	RESOLVE_CHECK(&config->consumerd32_bin_path);
	469	RESOLVE_CHECK(&config->consumerd32_lib_dir);
	470	RESOLVE_CHECK(&config->consumerd32_err_unix_sock_path);
	471	RESOLVE_CHECK(&config->consumerd32_cmd_unix_sock_path);
	472	RESOLVE_CHECK(&config->consumerd64_path);
	473	RESOLVE_CHECK(&config->consumerd64_bin_path);
	474	RESOLVE_CHECK(&config->consumerd64_lib_dir);
	475	RESOLVE_CHECK(&config->consumerd64_err_unix_sock_path);
	476	RESOLVE_CHECK(&config->consumerd64_cmd_unix_sock_path);
	477	RESOLVE_CHECK(&config->kconsumerd_path);
	478	RESOLVE_CHECK(&config->kconsumerd_err_unix_sock_path);
	479	RESOLVE_CHECK(&config->kconsumerd_cmd_unix_sock_path);
	480	return 0;
	481	}
	482
e6142f2e JG	483	void sessiond_config_log(struct sessiond_config *config)
	484	{
	485	DBG_NO_LOC("[sessiond configuration]");
a3bc3918 JR	486	DBG_NO_LOC("\tversion %s", VERSION);
	487	if (GIT_VERSION[0] != '\0') {
	488	DBG_NO_LOC("\tgit version %s", GIT_VERSION);
	489	}
	490	if (EXTRA_VERSION_NAME[0] != '\0') {
	491	DBG_NO_LOC("\textra version name %s", EXTRA_VERSION_NAME);
	492	}
	493	if (EXTRA_VERSION_DESCRIPTION[0] != '\0') {
	494	DBG_NO_LOC("\textra version description:\n\t%s", EXTRA_VERSION_DESCRIPTION);
	495	}
7f5ed73a JR	496	if (EXTRA_VERSION_PATCHES[0] != '\0') {
	497	DBG_NO_LOC("\textra version patches:\n\t%s", EXTRA_VERSION_PATCHES);
	498	}
2ca43cb1 JR	499	DBG_NO_LOC("\tverbose: %i", config->verbose);
	500	DBG_NO_LOC("\tverbose consumer: %i", config->verbose_consumer);
	501	DBG_NO_LOC("\tquiet mode: %s", config->quiet ? "True" : "False");
2288467f	502	if (config->agent_tcp_port.begin == config->agent_tcp_port.end) {
2ca43cb1	503	DBG_NO_LOC("\tagent_tcp_port: %i", config->agent_tcp_port.begin);
2288467f	504	} else {
2ca43cb1	505	DBG_NO_LOC("\tagent_tcp_port: [%i, %i]",
2288467f JG	506	config->agent_tcp_port.begin,
	507	config->agent_tcp_port.end);
	508	}
2ca43cb1 JR	509	DBG_NO_LOC("\tapplication socket timeout: %i", config->app_socket_timeout);
	510	DBG_NO_LOC("\tno-kernel: %s", config->no_kernel ? "True" : "False");
	511	DBG_NO_LOC("\tbackground: %s", config->background ? "True" : "False");
	512	DBG_NO_LOC("\tdaemonize: %s", config->daemonize ? "True" : "False");
	513	DBG_NO_LOC("\tsignal parent on start: %s", config->sig_parent ? "True" : "False");
	514	DBG_NO_LOC("\ttracing group name: %s", config->tracing_group_name.value ? : "Unknown");
	515	DBG_NO_LOC("\tkmod_probe_list: %s", config->kmod_probes_list.value ? : "None");
	516	DBG_NO_LOC("\tkmod_extra_probe_list: %s", config->kmod_extra_probes_list.value ? : "None");
	517	DBG_NO_LOC("\trundir: %s", config->rundir.value ? : "Unknown");
	518	DBG_NO_LOC("\tapplication socket path: %s", config->apps_unix_sock_path.value ? : "Unknown");
	519	DBG_NO_LOC("\tclient socket path: %s", config->client_unix_sock_path.value ? : "Unknown");
	520	DBG_NO_LOC("\twait shm path: %s", config->wait_shm_path.value ? : "Unknown");
	521	DBG_NO_LOC("\thealth socket path: %s", config->health_unix_sock_path.value ? : "Unknown");
	522	DBG_NO_LOC("\tLTTNG_UST_CLOCK_PLUGIN: %s", config->lttng_ust_clock_plugin.value ? : "None");
	523	DBG_NO_LOC("\tpid file path: %s", config->pid_file_path.value ? : "Unknown");
	524	DBG_NO_LOC("\tlock file path: %s", config->lock_file_path.value ? : "Unknown");
	525	DBG_NO_LOC("\tsession load path: %s", config->load_session_path.value ? : "None");
	526	DBG_NO_LOC("\tagent port file path: %s", config->agent_port_file_path.value ? : "Unknown");
	527	DBG_NO_LOC("\tconsumerd32 path: %s", config->consumerd32_path.value ? : "Unknown");
	528	DBG_NO_LOC("\tconsumerd32 bin path: %s", config->consumerd32_bin_path.value ? : "Unknown");
	529	DBG_NO_LOC("\tconsumerd32 lib dir: %s", config->consumerd32_lib_dir.value ? : "Unknown");
	530	DBG_NO_LOC("\tconsumerd32 err unix sock path:%s", config->consumerd32_err_unix_sock_path.value ? : "Unknown");
	531	DBG_NO_LOC("\tconsumerd32 cmd unix sock path:%s", config->consumerd32_cmd_unix_sock_path.value ? : "Unknown");
	532	DBG_NO_LOC("\tconsumerd64 path: %s", config->consumerd64_path.value ? : "Unknown");
	533	DBG_NO_LOC("\tconsumerd64 bin path: %s", config->consumerd64_bin_path.value ? : "Unknown");
	534	DBG_NO_LOC("\tconsumerd64 lib dir: %s", config->consumerd64_lib_dir.value ? : "Unknown");
	535	DBG_NO_LOC("\tconsumerd64 err unix sock path:%s", config->consumerd64_err_unix_sock_path.value ? : "Unknown");
	536	DBG_NO_LOC("\tconsumerd64 cmd unix sock path:%s", config->consumerd64_cmd_unix_sock_path.value ? : "Unknown");
	537	DBG_NO_LOC("\tkconsumerd path: %s", config->kconsumerd_path.value ? : "Unknown");
	538	DBG_NO_LOC("\tkconsumerd err unix sock path: %s", config->kconsumerd_err_unix_sock_path.value ? : "Unknown");
	539	DBG_NO_LOC("\tkconsumerd cmd unix sock path: %s", config->kconsumerd_cmd_unix_sock_path.value ? : "Unknown");
e6142f2e	540	}